Valve device for internal-combustion engines.



y S. G. MILLIGAN.

V'ALVE DEVICE FOR INTERNAL COMBUSTION ENGINES.

' APPLICA'HON FILED )UNE 22, 1916.

Patented Mar. 26, 1918.

SAMUEL G. MILLIGAN, 0F HABWICK, PENNSYLVANIA. i

' 'VALVE DEVICE FOR INTERNAL-COMBUSON ENGINES.

Specication of Letters Patent. Patentes@ Mmm 521B., 191i! Application mea :une 2a, 191s. serial No. 105,122.

Valve Devices for Internal-Combustion En gines, of which the following is a specification.

This invention relates to improvements in valve devices for internal combustion engines, and particularly to an engine of the four cycle multicylinder type.

The primary objects of this invention are to provide valve devices of the character specified, wherein rotating valves, with large bearing surfaces and operated directly from the crank shaft are utilized for controlling both the inlet and the exhaust, which Vare noiseless and positive in their action and operation, and which are so constructed and operated 'as to prevent carbonization, thereby eliminating the necessity of grinding same.

Further objects of this invention are to provide valve devices of the rotary type, wherein the valves are mounted upon and operated by a single shaft, and in which the leakage of the gas mixture shall be effectively prevented or reduced to a minimum.

Still further objects of this invention are to provide a device for the purpose set forth, which is simple in its construction and arrangement, strong, durable and eiicient in its use, and inexpensive to manufacture.

To the accomplishment of these and such other objects as may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts specically described, and illustrated in the accompanying drawing, wherein isshown an embodiment of theinvention.

ln the drawing, forming a portion of this specification, and wherein like numerals of reference designate corresponding parts f throughout the several views:

Figure 1 is a longitudinal sectional view of the valve devices in' accordance with this invention, as applied tov an internal combustion engine.

Fig. 2 is a cross sectional View on line in Fig. 1.

Fig. 3 is a detail plan view of thedsk valve.

Fig. 4 is a cross sectional view on the line y-y, in Fig. 3.

Referring more 1n detail to the drawing,

the numerals 1, 2, 3 and 4 designate the respective cylinders ofthe engine, here four in number, which are preferably made in one casting.

Extending along the one side of the head portion of the engine is the valve casing 5, which is divided into as many separate valve chambers'as there are cylinders and it is therefore shown here as provided with'four valve chambers 6, 7, 8 and 9, arranged to make communication, through the ports 10,

11, 12 and 13, with the cylinders 1, 2, 3 and 4 respectively. Portions of the valve chambers 6, 7, 8 and 9 are divided into upper vsections 14, 15, 16 and 17 and into lower sections 18, 19, 20 and 21 by the centrally disposed walls 22, 23, 24 and 25, which extend from the ends 26, 2,7, 28 and 29 of the valve chambers 6, -7, 8 and 9 to the valve seats 30, 31, 32 and 33. The supply conduits communicate with said lower sections 18, 19, 2O and 21 through the ports 65, and the products of combustion are exhausted through the ports 66, which are in communication with the upper sections 14, 15, 16 and 17. t

The valve seats 30, 31, 32 and 33, one in each of the valve chambers 6, 7, 8 and 9 and formed integral with the valve casing 5 or secured therein in any suitable manner, are provided with the inlet ports 34, 35, 36 and 37, which communicate with the lower sections 18, 19, 20 and 21 of the said valve chambers; said valve seats are further provided with the exhaust ports 38, 39, 40 and 41 communicating with the upper sections 14, 15, 16 and l17 of the said valve chambers. The inlet ports 34, 35, 36 and 37, and the exhaust ports 38, 39, 40 and 41 of the valve A land theA said exhaust seats 30, 31, 32 and 33, extend-to the peripheries of said valve seats, and at said peripheries are commensurate to one-ei hth the circumference of said disk valves. ortions 42, as shown in Fig. 2, off the said valve seats, having the same peripherical measurements as one of the said inlet or exhaust ports, are disposed intermediate the said inlet ports Orts.

The shaft 43, rovlided with theV driving gear 44 and suita ly journaled at 45 and 46,- extends longitudinally through the valve casing 5 and carries the disk valves 47 Said disk valves are provided with the hubs 48 and can-be adjusted upon the said shaft by means of the set screws 49. The disk valves 47 are'further provided with the ports 50, which are identical in contour to, and which are adapted to register with the inlet and exhaust ports ofthe valve seats 30, 31, 32 and 33. j

On the peripheries of the disk valves 47 are the flanges 51, disposed at right angles thereto, but extending but five-eighties of the distance around same. The ports 50 are located centrally of' the ends 52 and 53 of the flanges 51, as shown in Fig. 3.

The spring 54 is arranged on theshaft 43 for the purpose of keeping the disk valves447 in proper engagement against the valve seats 30, 31, 32 and 33, respectively, and may be adjusted by means of the collar 55 and the set screw 56 cn the shaft 43.

Rotation is imparted to the shaft 43 andV the disk valves 47, mounted thereon, by the drivin gear 44 being geared to the crank sha t of the engine in any suitable manner, although any mechanical equivalent can be employed 4to rotate said shaft and disk valves.

For the purpose of aiording ready access to the valve devices and for assembling same, the valve casing 5 is made preferably with a removable portion 57, as illustrated in Fig. 2, the other portion 58 oli the valve casing 5, being formed integral with the engine casting. The two portions 57 and 58 of the valve casing 5, are securely held together and in position by means ofthe bolts 59.

As illustrated in Fig. 2, at 60 and 61, eiicient arrangement is made to provide for water-cooling that part of the valve device which is most exposed to the firing.

Referring to Fig. 2, of the drawin ,'there is shown a cross sectional view of t e cylinder 1, provided with the annular chambered portion 62, for water cooling said cylinder, and with the usual spark plug 63. The iston 64 is operated in the usual man ner om the crank shaft.

In operation, when the piston 64 has reached the end of its upward stroke and the products of combustion or exhaust are driven fromthe cylinder, the port 50 of the .the port 50 of the disk valve 47, will register with the inlet port 34 of the valve seat 30, and a charge is drawn into the said cylinder through the port 65 in the lower section 18 in the valve chamber 6, and through the port 10 which communicates with the cylinder 1. Beingv a four cycle type engine, when the piston 64 has reached the end of its downward stroke, the disk valve 47 )vill now havetaken a one-,quarter turn and the port 10 will be closed by the flange 51, on the periphery of the disk valve 47. The inlet port 34 and the exhaustport 38 of the valve seat 30 will likewise be closed, and

exhaust to be forced rom the cylinder 1 through the port 66 in the upper section 14 of the valve chamber 6.

From the foregoing description, taken in l 'connection with the accompanying drawing, the operation, in practice, of the various cylinders with their respective valve devices, will be readily understood without a more extended explanation, as all are identical in their construction, arrangement and operation, with the exception that the various disk valves are so adjusted upon the shaft that said disk valves will act in timed relation` with reference to the strokes Aof the pistons.

While tion of the invention together with the device which is now considered to be the best embodiment thereof,`it is to be understood that various changes in the form, proportion and the minor details of construction may be resorted to `without departing from the principle' or. sacrificing any of the advantages of the invention as defined in the appended claim.

What I claim as new and desire to secure by Letters 'Patent is In valve mechanism in combination, l a valve casing having the interior thereof didescribing the principle of operavided by horizontal and vertical partitions said seat having openings establishing communication between the valve chamber and upper and lower gas chambers, a cylinder chamber and a rotatably mounted disk valve arranged in at contact with the seat and having a port adapted to register with said o enings, said disk valve being further provlded with a peripheral flange having its 10 ends terminating short of said port in the valve disk and extending at right angles thereto, said ange being of a width equal to -the depth of said valve chamber. communicating directly with the valve In testimony whereof I aix my signature in the presence of two witnesses.

SAMUEL Gr. MILLIGAN.

' Witnesses:

JENNIE JONES, JAS. R. SNYDER. 

